Use Minitest instead of ActiveSupport for testing

Gemfile

@@ -18,6 +18,7 @@ gem "sorbet-static-and-runtime", platforms: :ruby
 gem "tapioca", "~> 0.13", require: false, platforms: :ruby
 gem "psych", "~> 5.1", require: false
 gem "rails", "8.0.0.beta1"
+gem "test_declarative"
 
 platforms :mingw, :x64_mingw, :mswin, :jruby do
   gem "tzinfo"

Gemfile.lock

@@ -250,6 +250,7 @@ GEM
       spoom (>= 1.2.0)
       thor (>= 1.2.0)
       yard-sorbet
+    test_declarative (0.0.6)
     thor (1.3.2)
     timeout (0.4.1)
     tzinfo (2.0.6)
@@ -289,6 +290,7 @@ DEPENDENCIES
   sorbet-static-and-runtime
   sqlite3
   tapioca (~> 0.13)
+  test_declarative
   tzinfo
   tzinfo-data
 

Rakefile

@@ -13,7 +13,13 @@ require "rake/testtask"
 Rake::TestTask.new(:test) do |t|
   t.libs << "test"
   t.libs << "lib"
-  t.test_files = FileList["test/**/*_test.rb"]
+  t.test_files = FileList["test/**/*_test.rb"] - ["test/ruby_lsp_rails/server_test.rb"]
 end
 
-task default: [:"db:setup", :test]
+Rake::TestTask.new("test:server") do |t|
+  t.libs << "test"
+  t.libs << "lib"
+  t.test_files = ["test/ruby_lsp_rails/server_test.rb"]
+end
+
+task default: [:"db:setup", :test, "test:server"]

gemfiles/Gemfile-rails-main

@@ -19,6 +19,7 @@ gem "sorbet-static-and-runtime", platforms: :ruby
 gem "tapioca", "~> 0.11", require: false, platforms: :ruby
 gem "psych", "~> 5.1", require: false
 gem "rails", github: "rails/rails", branch: "main"
+gem "test_declarative"
 
 platforms :mingw, :x64_mingw, :mswin, :jruby do
   gem "tzinfo"

test/ruby_lsp_rails/addon_test.rb

@@ -5,7 +5,7 @@
 
 module RubyLsp
   module Rails
-    class AddonTest < ActiveSupport::TestCase
+    class AddonTest < Minitest::Test
       test "name returns add-on name" do
         addon = Addon.new
         assert_equal("Ruby LSP Rails", addon.name)

test/ruby_lsp_rails/code_lens_test.rb

@@ -5,8 +5,8 @@
 
 module RubyLsp
   module Rails
-    class CodeLensTest < ActiveSupport::TestCase
-      setup do
+    class CodeLensTest < Minitest::Test
+      def setup
         GlobalState.any_instance.stubs(:test_library).returns("rails")
         @ruby = Gem.win_platform? ? "ruby.exe" : "ruby"
       end

test/ruby_lsp_rails/definition_test.rb

@@ -5,7 +5,7 @@
 
 module RubyLsp
   module Rails
-    class DefinitionTest < ActiveSupport::TestCase
+    class DefinitionTest < Minitest::Test
       test "recognizes model callback with multiple symbol arguments" do
         response = generate_definitions_for_source(<<~RUBY, { line: 3, character: 18 })
           # typed: false

test/ruby_lsp_rails/document_symbol_test.rb

@@ -5,7 +5,7 @@
 
 module RubyLsp
   module Rails
-    class DocumentSymbolTest < ActiveSupport::TestCase
+    class DocumentSymbolTest < Minitest::Test
       test "recognizes Rails Active Support test cases" do
         response = generate_document_symbols_for_source(<<~RUBY)
           class Test < ActiveSupport::TestCase

test/ruby_lsp_rails/hover_test.rb

@@ -5,7 +5,7 @@
 
 module RubyLsp
   module Rails
-    class HoverTest < ActiveSupport::TestCase
+    class HoverTest < Minitest::Test
       test "hook returns model column information" do
         expected_response = {
           schema_file: "#{dummy_root}/db/schema.rb",

test/ruby_lsp_rails/indexing_enhancement_test.rb

@@ -5,7 +5,7 @@
 
 module RubyLsp
   module Rails
-    class IndexingEnhancementTest < ActiveSupport::TestCase
+    class IndexingEnhancementTest < Minitest::Test
       class << self
         # For these tests, it's convenient to have the index fully populated with Rails information, but we don't have
         # to reindex on every single example or that will be too slow

test/ruby_lsp_rails/launch_test.rb

@@ -5,7 +5,7 @@
 
 module RubyLsp
   module Rails
-    class LaunchTest < ActiveSupport::TestCase
+    class LaunchTest < Minitest::Test
       test "launching the client succeeds" do
         outgoing_queue = Thread::Queue.new
 

test/ruby_lsp_rails/runner_client_test.rb

@@ -6,13 +6,13 @@
 
 module RubyLsp
   module Rails
-    class RunnerClientTest < ActiveSupport::TestCase
-      setup do
+    class RunnerClientTest < Minitest::Test
+      def setup
         @outgoing_queue = Thread::Queue.new
         @client = T.let(RunnerClient.new(@outgoing_queue), RunnerClient)
       end
 
-      teardown do
+      def teardown
         @client.shutdown
 
         # On Windows, the server process sometimes takes a lot longer to shutdown and may end up getting force killed,
@@ -156,8 +156,10 @@ def execute(request, params)
       end
     end
 
-    class NullClientTest < ActiveSupport::TestCase
-      setup { @client = NullClient.new }
+    class NullClientTest < Minitest::Test
+      def setup
+        @client = NullClient.new
+      end
 
       test "#shutdown is a no-op" do
         assert_nothing_raised { @client.shutdown }

test/ruby_lsp_rails/server_test.rb

@@ -1,11 +1,11 @@
 # typed: true
 # frozen_string_literal: true
 
-require "test_helper"
+require "test_helper_server"
 require "ruby_lsp/ruby_lsp_rails/server"
 
-class ServerTest < ActiveSupport::TestCase
-  setup do
+class ServerTest < ActiveSupport::TestCase # Minitest::Test
+  def setup
     @stdout = StringIO.new
     @server = RubyLsp::Rails::Server.new(stdout: @stdout, override_default_output_device: false)
   end

test/ruby_lsp_rails/support/location_builder_test.rb

@@ -6,7 +6,7 @@
 module RubyLsp
   module Rails
     module Support
-      class LocationBuilderTest < ActiveSupport::TestCase
+      class LocationBuilderTest < Minitest::Test
         test "line_location_from_s raises argument error if invalid string given" do
           assert_raises(ArgumentError) { LocationBuilder.line_location_from_s("banana") }
         end

test/ruby_lsp_rails_test.rb

@@ -4,7 +4,7 @@
 require "test_helper"
 
 module RubyLsp
-  class RailsTest < ActiveSupport::TestCase
+  class RailsTest < Minitest::Test
     test "it has a version number" do
       assert RubyLsp::Rails::VERSION
     end

test/test_helper.rb

@@ -1,16 +1,10 @@
 # typed: true
 # frozen_string_literal: true
 
-# Configure Rails Environment
-ENV["RAILS_ENV"] = "test"
-
-require_relative "../test/dummy/config/environment"
-ActiveRecord::Migrator.migrations_paths = [File.expand_path("../test/dummy/db/migrate", __dir__)]
-ActiveRecord::Migrator.migrations_paths << File.expand_path("../db/migrate", __dir__)
-require "sorbet-runtime"
-require "rails/test_help"
-require "mocha/minitest"
 require "ruby_lsp/internal"
+require "minitest/autorun"
+require "test_declarative"
+require "mocha/minitest"
 require "ruby_lsp/test_helper"
 require "ruby_lsp/ruby_lsp_rails/addon"
 
@@ -26,8 +20,8 @@
   # Tapioca (and thus Spoom) is not available on Windows
 end
 
-module ActiveSupport
-  class TestCase
+module Minitest
+  class Test
     extend T::Sig
     include RubyLsp::TestHelper
 
@@ -63,5 +57,35 @@ def pop_message(outgoing_queue, &block)
       message = outgoing_queue.pop until block.call(message)
       message
     end
+
+    # Copied from Rails
+    def assert_nothing_raised(*args)
+      msg = if Module === args.last
+        nil
+      else
+        args.pop
+      end
+      begin
+        line = __LINE__
+        yield
+      rescue MiniTest::Skip
+        raise
+      rescue Exception => e # rubocop:disable Lint/RescueException
+        bt = e.backtrace
+        as = e.instance_of?(MiniTest::Assertion)
+        if as
+          ans = /\A#{Regexp.quote(__FILE__)}:#{line}:in /
+          bt.reject! { |ln| ans =~ ln }
+        end
+        if (args.empty? && !as) ||
+            args.any? { |a| a.instance_of?(Module) ? e.is_a?(a) : e.class == a }
+          msg = message(msg) { "Exception raised:\n<#{mu_pp(e)}>" }
+          raise MiniTest::Assertion, msg.call, bt
+        else
+          raise
+        end
+      end
+      nil
+    end
   end
 end

test/test_helper_server.rb

@@ -0,0 +1,11 @@
+# typed: true
+# frozen_string_literal: true
+
+# Configure Rails Environment
+ENV["RAILS_ENV"] = "test"
+
+require "test_helper"
+
+require_relative "../test/dummy/config/environment"
+ActiveRecord::Migrator.migrations_paths = [File.expand_path("../test/dummy/db/migrate", __dir__)]
+ActiveRecord::Migrator.migrations_paths << File.expand_path("../db/migrate", __dir__)